This is a special collector's edition of Castle of Frankenstein #20, published in January 1973 by Gothic Castle. The magazine features horror, monster, fantasy, and science fiction genres, with a focus on comic books. The issue was a collaboration with Ray Harryhausen, a well-known contributor, and features his work prominently.

The magazine's features include first-edition content, and it has an ISSN of 20. The language used in the publication is English, and it is part of a series of Special Collector's Editions. This item is a must-have for collectors of horror and monster memorabilia. It falls under the categories of collectibles, comic books and memorabilia, and magazines.